| 摘要 |
<p>To set the working frequency of an orbital vibration welding system, the frequency is varied within a given frequency range. The geometric shape of the oscillation is registered, and the frequency for the working frequency is selected which matches the best possible oscillation shape. Also claimed is an appts. with a processor, with inputs to take the monitored oscillation shape of the oscillation head and the coil current of the electro-magnetic drive, together with the voltages for the frequency and amplitude adjustments for setting the electro-magnetic drive. The processor is linked to the inputs and outputs of a machine control. Pref. in a given frequency range, the working frequency for the electromagnets is altered until the resonance frequency is registered at a min. current and power. From the resonance frequency, the working frequency is varied to higher and/or lower values, and the oscillation shapes are measured, for the working frequency to be set for the best oscillation shape. Checks are made to ensure that there is a stable oscillation shape with the selected and set working frequency. If the oscillation shape is not stable, the resonance frequency is selected and set for the min. current. According to the workpiece geometry, the best oscillation shape is the best possible circular and elliptical shape, or a linear oscillation shape.</p> |
